Best Communication - Custom Communication Systems software in 2026

Screego

screego.net

Open source

Screego is a simple tool to quickly share your screen to one or multiple people via web browser.

Shhh

github.com

Open source

Keep secrets out of emails or chat logs, share them using secure links with passphrase and expiration dates.

SimpleX Chat

github.com

Open source

The most private and secure chat and applications platform - now with double ratchet E2E encryption.

Spectrum 2

spectrum.im

Open source

Spectrum 2 is an open source instant messaging transport. It allows users to chat together even when they are using different IM networks.

Stoat

stoat.chat

Open source

Stoat is a user-first chat platform built with modern web technologies.

Synapse

element-hq.github.io

Open source

Server for Matrix, an open standard for decentralized persistent communication.

Tox

tox.chat

Open source

Distributed, secure messenger with audio and video chat capabilities.

Tuwunel

tuwunel.chat

Open source

High-performance and feature-rich chat server for Matrix, and the successor to conduwuit (fork of Conduit).

Typebot

typebot.io

Open source

Conversational app builder (alternative to Typeform and Landbot).

WBO

github.com

Open source

Web Whiteboard to collaborate in real-time on schemas, drawings, and notes.

Zulip

zulip.org

Open source

Zulip is a powerful, open source group chat application.